Measuring pump



H. SEBELL MEASURING PUMP June 9, 1931.

Filed June 4, '1929 v 2 Sheets-Sheet 1 lnvenT or Hurry SebaLL byfawwkj ATTyS.

Patented June 9, 193l I i UNITED STATES caries HARRY SEBELL, 013 BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO ARTHUR H.

PARKER, F LEXINGTON, MASSACHUSETTS MEASURING PUMP Application filed June 4-, 1929. Serial No. 368,248.

This invention relates to measuring pumps Fig. 7 is a fragmentary view illustrating and particularly to a measuring pump of the the operation of the pinion 12 and rack 10. type shown in my co-pending application Se- The main elements of the pump herein rial No. 339,465, filed January 2, 1929. The shown are similar to those found in my abovepump illustrated in said application commentioned co-pending application Serial No. 55 prises a cylinder of known capacity and hav- 39,465. These comprise a cylinder member ing a port, an inlet pipe and a discharge pipe 1 having a known capacity and which is enwith which the cylinder port is adapted to closed in a stationary housing 2. This houscommunicate alternately, a piston operating log 2 has an inlet pipe 3 leading thereto and in said cylinder and means to prevent any a discharge pipe 4 leading therefrom. The 60 vem t f th pi t n x t that of the cylinder 1 is provided with a port 5 and said suction stroke while the cylinder is in comcylinder is turnable in the casing 2 to put munication with the inlet pipe, and any movethe port 5 into communication with either the ment of the piston except that of the disnlet pipe 3 orthe discharge pipe at.

1:! charge stroke while the cylinder is in com- 6 indicates a piston operating in the cyl- 65 munication with the discharge port. inder. By placing the cylinder with its port On obj ct of the p es nt i venti i t 5 in communication with the inlet pipe 3 as improve a measuring pump of the above type shown in Fig. 5 during the up or suction by providing novel means for actuating the stroke of the pistonfi, the cylinder will be piston to give it the suction and discharge filled with a measured quantity of liquid and 70 strokes and also to actuate the cylinder been by Shifting the cylinder to bring its port tween the strokes to shift its position in order 5 into communication with the discharge pipe to bring its port into communication with 4: and forcing the piston downwardly this the discharge pipe at the proper times in the measured quantity of liquid will be diseyele f ti charged. The operation of the device, there- 75 In my present invention I provide a novel O iIWOlVOS IlOt n y g g the p o its actuating device which is common to both the reciprocating movement but also involves piston and the cylinder and by which the pisrning the cylinder at the. proper times to ton and cylinder are given their respective bring its port 5 into communication altermovements in proper timed relation, na-tely with the inlet pipe 3 and discharge .80

' In order to give an understanding of the pipe 4.

invention I have illustrated in the drawings 'My invention relates to a novel means for. a selected embodiment thereofwhichwill now thus actuating both the piston and the cylinhe described after which the novel features der. I have provided a common actuator ill b inted out in the appended claims. with suitable connections so that when the 85 Fig. 1 is a front View of a measuring pump actuator is operated the piston will be recipembodying'my invention-with'a partbroken rocated and the cylinder will be turned in out; a I proper timed relation, the turning of the cyl- Fig. 2 is a top plan view also with a part inder from one position to another occurring 40 broken out; atthe end of the piston stroke and while the 99 Fig. 3 is a section on the line 33, Fig. 4; piston is at rest. 1 showing the position of the actuating pinion Thepiston is shown as having a piston rod during the discharge stroke; 7 connected thereto. which is secured to a Fig. 4 is a vertical section on substantially cross head 8. The cross head 8 has rigidly sev the line l4t, Fig. 1; cured to it a' depending actuating bar 9 95 F ig. 5 is a section similar to Fig. 3 but showwhich is located on the outside of the casing 2 ing the position of the parts duringthe sucand which has secured to its lower end a rection stroke; c tangular skeleton rack bar member 10 with Fig. 6 is a fragmentary view of the rack and the rackteeth 11 on the outer face thereof.

pinion structure; This rack bar co-operates with an operating pinion 12 which is shown as fast on a shaft 13 Journalled in a bearing 14: formed on a supporting bridge member 15 that is rigid with the casing.

The shaft 13 is shown as provided with a handle 16 by which the pinion 12 may be rotated. The rack teeth 11 are held in engagement with the pinion 12 by means of a. keeper member 17 which is loosely mounted on the shaft 13 between the pinion 12 and the bearing 14 and which is provided with a retainer portion 18 that engages the inner face 19 of the skeleton rack member 10. r

Figs. 1, 4 and 6 show the position of the rack bar relative to the pinion when the pis ton is at the upper end of the stroke and while the cylinder being turned from the position shown in Fig". 5 to that shown in Fig. 3, the position of the piston 6 corresponding to a mid position of the cylinder.

Assuming that the cylinder is being rotated in the direction of the arrow Fig. (3 it will be seen that the rack bar will be moving horizontally toward the left as indicated by the arrow. The rack bar is rigid with the actuator bar 9 and the latter is so connected to the cylinder that the lateral or horizontal movement of the rack bar gives a turning movement to the cylinder. The cyiinder head 20 is provided with a plate 21 which is formed with a notch 22 in which the actuator bar 9 operates and hence any lateral movement of the rack bar and the actuator member 9 will operate through the plate 21 and cylinder head 20 to turn the cylinder.

The rack bar has been so designed that the extent of its horizontal movement is just suflicient to shift the cylinder from the position shown in Fig. 5 to that shownin Fig. 3 or vice versa.

Referring again to Fig. 6 when, due to the rotation of the pinion 12, the rack bar mem ber 10 has been carried to the left to a point \vhere the pinion reaches the corner 23 of the rack bar then the retainer 18 will enter the pocket 24 formed in the inner face of the rack bar member as seen in Fig. 7 and as the rotation of the pinion 12 continues said pinion will travel around the corner of the rack bar or, in other words, the rack bar will begin to descend on the left hand side of the pinion, the engagement of the keeper 18 with the inner face 19 of the rack bar maintaining the proper engagement of the teeth of the pinion with the rack bar teeth. As the pinion rounds the corner of the rack bar member the keeper 17 will. swing into the horizontal position shown in Fig. 5 and as the pinion 12 continues its rotation the teeth on the right hand side of the rack bar will be in engagement with the pinion and the rack bar will be moved downwardly thus giving the piston its downwardor discharge stroke. At this time the cylinder port is in communication with the discharge pipe 4 as shown in F ig. 3.

When the rack bar has reached the downward limit of its movement the keeper 18 will enter the pocket 25 and the rack bar will begin its swing to the right underneath the P1111011.

lVhile the upper portion 26 of the rack bar is passing under the pinion the piston will be stationary but the cylinder will be turned from the position shown in Fig. 3 to that shown in Fig. 5 thus bringing'the cylinder port 5 into communication with the inlet pipe 3. When the upper side of the rack bar has travelled across underneath the pinion 12 then the co-operation of the keeper with the rack bar will cause the rack bar to move upwardly on the right hand side of the pinion thereby givingthe piston its suction stroke. At this time the cylinder port 5 is in communication with the inlet pipe 3 so that the cylinder will be filled with liquid.

When the piston reaches the upper end of its stroke the rack bar will pass over above the pinion as shown in Fig. 6 and while the pieton remains stationary at the upper end of the stroke the cylinder will be shifted from the position shown in Fig. 5 to that shown in Fig. 3. By simply turning the crank handle 16 therefore the piston will be given its alternate suction and discharge strokes and the cylinder will also be shifted from a position with its port 5 in communication with the inlet port 3 as shown in Fig. 5 to a position with its port in comnmnication with the discharge pipe 1 as shown in Fig. 3, while the piston re mains stationary at the upper end of the stroke, and will be given its reverse movement back into the position shown in Fig. 5 while the piston is stationary at the lower end of the stroke. 1

Means are provided to prevent the crank from being turned hackwardly thus compelling always a forward movement of the pinion. For this purpose the shaft 13 has rigid thereon a ratchet wheel 27 with which co-operates a spring pawl 28 pivoted at 29 to the bridge member 15. The. pawl allows the ratchet wheel to rotate in the direction, of the arrow but prevents backward rotation.

Under some circumstances it may be desirable to discharge a measured quantity of liquid from the cylinder'l which is less than the full capacity of said cylinder. In order to permit this to be done I have provided a gauge member 30 which is adj ustably secured to the cross head 1 and which will by its engagen'ient with the cylinder head limit the downward movement of the piston.

If it is desired to discharge the entire contents of the cylinder then the gauge 30 will be raised to a point where it will not engage the cylinder head even when the piston is at the bottom of its stroke. On the other hand, if it is desired to discharge only one-half the contents of the cylinder or some other proportional part thereof then'the gauge 30 will be correspondingly adjusted on the cross head, the adjustment being such that it will engage the cylinder head during the downward movement of the piston at the time that the desired quantity of liquidhas beendischarged. As herein shown the cross head 8 is provided with a guideway 31 in which the gauge bar 30 slides, the latter being held in adjusted position by a set screw 32 which has a pointed end adapted to be received in any one of a number of recesses 33 with which the gauge bar is provided.

The bridge member is secured to the casing 2 through the medium of spacer members 40 and these members are preferably so placed that when the rack 10 is moving vertically it will engage with one or the other of said spacer members as shown in Figs. 8 and The cylinder head is shown as rigidly secured to the cylinder 1 through the medium of a screw 35. Said cylinder head is provided with the flange 37 which fits inside the cylinder and the screw extends through the upper end of the cylinder and into the flange. This screw also operates in a slot 34 formed in the casing 2 and thus serves to re-' tain the cylinder in the casing.

Vi hile I have illustrated a selected embodiment of my invention I do not Wish to be limited to the constructional features shown.

I claim.

1. In a measuring pump, the combination with a cylinder having a port, an inlet pipe, a discharge pipe, said cylinder being movable from a position in which its port communicates with one of said pipes to a position in which its port communicates with the other of said pipes, a piston operating in and litting the bore of said cylinder, and means operating both to reciprocate the piston and to move the cylinder from one position to the other.

2. In a measuring pump, the combination with a cylinder having a port, of an inlet pipe, a discharge pipe, said cylinderbeing turnable about its axis from a position in wh ich. its port registers with the inlet pipe to a position inwhich its port registers with the discharge pipe, a piston operating in and fitting the bore of said cylinder, and means operating both to reciprocate the piston and to turn the cylinder from one position to the other. j

3. In a measuring pump, the combination with a cylinder having a port, of an inlet pipe, a discharge pipe, said cylinder being movable from a position in which its port communicates with one pipe to a position in which its port communicates with the other pipe, a piston operating in and fitting the bore of said cylinder, means common tothe piston and the cylinder to reciprocate the piston and to move the cylinder from one position to the other.

l. In a measuring pump, the combination with a cylinderhaving a port, of an inlet pipe, a discharge pipe, said cylinder being turnable about its axis from a position in which its port communicates with one pipe to a position in which its port communicates with the other pipe, a piston operating in said cylinder, an actuator connected to said.

piston and having a rack bar, and an operating pinion meshing with the rack bar, movement oi the rack bar given to it by the pinion operating both to reciprocate the piston and to move the cylinder from one position to the other.

5. In a measuring pump, the combination with a cylinder having a port, an inlet pipe, a discharge pipe, said cylinder being turnable about its axis from a position in which its port communicates with one pipe to a position in which its portv communicates with the other pipe, a piston operating in said cylinder, a rectangular rack bar connected to the piston, and an operating pinion meshing with the rack bar, the movement of the rack bar operating both to reciprocate the piston and to move the cylinder from one position to the other. v

6. In a measuring pump, the combination with a casing having an inlet pipe and a discharge pipe, a cylinder within the casing and having a port, said cylinder being turnable about its axis to bring its port into register with either pipe, a piston in said cylinder, an operating pinion journalled in bearings carried by the casing, and a rectangular rack bar meshing with the pinion and connected to the piston, the movement of: the rack bar which is given to it by the pinion operating to reciprocate the piston and also to turn the cylinder to bring its port into communication first with one'pipe and then the other.

In testimony whereof, Ihave signed my name to this specification.

HARRY SEBELL. 

